One question, one answer, screen by screen
Every guide starts from an operational question and follows it through the product, capture by capture, and says what the view does not show as well.
Endpoints
How to find which switch and port a MAC address is on
A user reports a problem and all you have is a MAC address. Search every MAC table at once and get the device, the interface and the VLAN.
›How to find where an IP address lives on the network
Give IP Finder an address and it searches every collected source, ARP tables, inventory and neighbours, then says which device holds it.
›How to search with a partial MAC address to find every device from one manufacturer
The first three bytes of a MAC identify the manufacturer. Search on that prefix and MAC Finder becomes an inventory of one vendor's devices.
›How to tell whether an IP belongs to a user device or to network equipment
IP Finder heads each block of results with the source that matched, and that heading tells you whether the address is an endpoint or a device.
›Security
How to see which ports are configured for 802.1X
Read 802.1X back off the switches themselves: which access ports actually carry it, in which mode, and where MAB is the fallback.
›How to check whether a device still allows Telnet
Telnet carries passwords in clear text. The devices still answering on port 23 are the ones nobody is watching, which is why they get missed.
›How to find devices using default or version 1 and 2c SNMP communities
An SNMP community is a password in clear text, and v1 and v2c have nothing else. Find the devices still carrying public, private or no better.
›How to read a device's management access posture
Management exposure is not one setting. Read which services answer, whether they are encrypted, confined to a VRF and centrally authenticated.
›Spanning tree
How to find which switch is root bridge for each VLAN
If the root bridge is not where you designed it, traffic takes a path you did not choose. Read the root for every switch and every VLAN.
›How to find which ports spanning tree is blocking
A blocking port is spanning tree doing its job. What matters is whether the ports it chose to block are the ones your design intended.
›How to check whether BPDU Guard is enabled on edge ports
BPDU Guard shuts a port the moment a switch appears where only endpoints should be. Check where it is enabled, and where it was forgotten.
›VLANs and L2
How to find every port carrying a VLAN
Before you change or retire a VLAN you need to know what actually uses it: every switch it appears on, with the ports assigned to it.
›How to see which VLANs a trunk allows
A VLAN reaches a remote site only if every trunk on the way allows it, so the allowed list is the first thing to read when one is missing.
›How to tell whether a VLAN still has any ports on a switch
Before removing a VLAN, the answerable question is not whether it is used but whether this switch still has ports assigned to it.
›All fifteen guides as one PDF
The complete programme, screenshots included, to read offline or to circulate internally.